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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: ValidationUtil.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.validation;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Set;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import javax.validation.ConstraintViolation;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>/**<a name="line.14"></a>
<span class="sourceLineNo">015</span> * Validation utility methods.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>public final class ValidationUtil {<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>    private ValidationUtil() {<a name="line.19"></a>
<span class="sourceLineNo">020</span>    }<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>    /**<a name="line.22"></a>
<span class="sourceLineNo">023</span>     * Validate the given object.<a name="line.23"></a>
<span class="sourceLineNo">024</span>     *<a name="line.24"></a>
<span class="sourceLineNo">025</span>     * &lt;p&gt;<a name="line.25"></a>
<span class="sourceLineNo">026</span>     * This method simply creates a {@link ValidationContext} with the given root and invokes {@link ValidationContext#validate()}.<a name="line.26"></a>
<span class="sourceLineNo">027</span>     * &lt;/p&gt;<a name="line.27"></a>
<span class="sourceLineNo">028</span>     */<a name="line.28"></a>
<span class="sourceLineNo">029</span>    public static &lt;T&gt; Set&lt;ConstraintViolation&lt;T&gt;&gt; validate(T obj) {<a name="line.29"></a>
<span class="sourceLineNo">030</span>        return new ValidationContext&lt;T&gt;(obj).validate();<a name="line.30"></a>
<span class="sourceLineNo">031</span>    }<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>    /**<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * Describe the validation errors in a friendly format.<a name="line.34"></a>
<span class="sourceLineNo">035</span>     *<a name="line.35"></a>
<span class="sourceLineNo">036</span>     * @param violations validation violations<a name="line.36"></a>
<span class="sourceLineNo">037</span>     * @return description of the validation errors<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * @throws NullPointerException if {@code violations} is null<a name="line.38"></a>
<span class="sourceLineNo">039</span>     */<a name="line.39"></a>
<span class="sourceLineNo">040</span>    public static String describe(Set&lt;? extends ConstraintViolation&lt;?&gt;&gt; violations) {<a name="line.40"></a>
<span class="sourceLineNo">041</span>        if (violations.isEmpty())<a name="line.41"></a>
<span class="sourceLineNo">042</span>            return "  (no violations)";<a name="line.42"></a>
<span class="sourceLineNo">043</span>        StringBuilder buf = new StringBuilder(violations.size() * 32);<a name="line.43"></a>
<span class="sourceLineNo">044</span>        for (ConstraintViolation&lt;?&gt; violation : violations) {<a name="line.44"></a>
<span class="sourceLineNo">045</span>            String violationPath = violation.getPropertyPath().toString();<a name="line.45"></a>
<span class="sourceLineNo">046</span>            buf.append("  ");<a name="line.46"></a>
<span class="sourceLineNo">047</span>            if (violationPath.length() &gt; 0)<a name="line.47"></a>
<span class="sourceLineNo">048</span>                buf.append("[").append(violationPath).append("]: ");<a name="line.48"></a>
<span class="sourceLineNo">049</span>            buf.append(violation.getMessage()).append('\n');<a name="line.49"></a>
<span class="sourceLineNo">050</span>        }<a name="line.50"></a>
<span class="sourceLineNo">051</span>        return buf.toString();<a name="line.51"></a>
<span class="sourceLineNo">052</span>    }<a name="line.52"></a>
<span class="sourceLineNo">053</span>}<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>




























































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